Heat Exchanger Repair & Overhaul

About the Heat Exchanger

A heat exchanger transfers thermal energy between two fluid streams without mixing them, and in aircraft heat-transfer systems it most commonly cools hot engine bleed air using cooler ram air or another medium. Of brazed plate-fin construction, it routes the streams through alternating finned passages so heat conducts across thin separating sheets, lowering process-air temperature ahead of downstream conditioning. It is a core element of the heat-transfer system's air-cooling capability. Service degradation includes internal and external fouling, corrosion, fin erosion, and clogging that reduces effectiveness and increases pressure drop. The dominant failure mode is cracking or pinhole leakage at brazed joints from thermal cycling and fatigue, driving leak testing, core repair, cleaning, and restoration of rated thermal performance.

Our Heat Exchanger Repair Capability

QTC repairs and overhauls heat exchanger components to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our engineers — including former OEM heat transfer specialists — perform teardown, inspection, cleaning, component replacement, functional and leak testing, and certification, and develop repairs for rejected and beyond-economic-repair (BER) hardware.

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